Wiseman Threading Tools Metric HSS Hand Tap Set ISO529 - M39x4 is a precision solution for creating and repairing metric threads with confidence. Crafted from high-speed steel and ground for accuracy, these taps deliver clean, consistent threads in a variety of materials, making them an indispensable part of any metalworking or fabrication toolkit.

Designed to ISO 529 specifications, this set guarantees the correct thread form, pitch, and crest for M39x4 right-hand threads. The uncoated HSS construction provides robust performance for general purpose tapping, offering reliable results across common metals when paired with proper cutting fluids and steady technique.

• HSS ground taps for precise threading and durable performance that stands up to daily workshop use.
• ISO 529 compliant threading ensures compatibility with standard metric fasteners and components.
• Uncoated finish optimized for general purpose tapping, with good chip flow and wide material compatibility when properly lubricated.
• Right-hand threads suited for the majority of standard assemblies and fastener applications.
• Compact, organized presentation as shown in the product image, enabling quick access and storage in tight tool chests or drawers.

Ideal use cases include repairing worn threads in machine housings or brackets, fabricating new threaded holes in steel or aluminum, and building custom fixtures that require reliable M39x4 compatibility. This set is well-suited for workshop professionals and serious DIYers who demand dependable tooling that delivers repeatable results without fuss.

Practical guidance for best results:

• Begin with a correctly sized pilot hole and apply a light, steady cutting fluid to reduce friction and heat buildup.
• Turn the tap slowly, maintaining even pressure. Periodically back off to break chips, then continue to full depth.
• Keep the taps clean and dry when not in use to preserve the uncoated surface and extend tool life.

Why choose this Wiseman tap set? It combines precision engineering with practical, everyday usability. You get ISO-standard threads you can trust, a durable HSS core, and a straightforward, general-purpose design that keeps your projects moving forward—whether you’re repairing an old project or fabricating a new component from scratch.